Paper-walled can.



J. R. HARBECK.

PAPER WALLED GAN.

APPLIoATIoN FILED JUNE 19. 1911.

1,062,002. Patented May 20, 1913.

2 SHEETS-SHEET 1.

@MM-WM' J. R. HARBEGK. PAPER WALLBD GAN.

APPLIGATION FILED V1mm 19, 1911.

1,062,002. Patented May 2o, 1913.

f 2 SHEETS-SHEET 2. fg 9 [6v/7 l v of the can to be made, and of suicient the completed UNITED s'rA'rEs PATENT OFFICE.

JERVIS R. HARBECK, 0F DETROIT, MICHIGAN, A SSIGNOR T0 DETROIT CAN COMPANY,

- OF. DETROIT, MICHIGAN, A CORPORATION OF-NEW JERSEY.

PAPER-WALLED -GAN'.

Specification of Letters Patent.

ratenteagiuay 2o,v 1913.

Application led J' une 19, 1911. Serial No. 634,021.

T0 all whom, t ma-g/ concern Be it kuownthat I, JEnvls R. HARBECK, a citizen of the United St-ates, residing in Detroit, in the county of Wayne and State of Michigan, have inventeda new anduseful Improvement in Paper-Walled Cans, of which the following is a specification.

This invention relates to an improvement in the construction of cans and vessels having paper bodies, and the invention consists in forming the body of strips ,of the paper material in several -layers together by a cement which is coated upon one layer and caused to adhere to the adjacent layer by the application of heat; and

lavers to one another in step fashion, so

that the strips when formed into a body may l be joined one end to the other end readily;l and it further consists in the means for facilitating the formation of the endless paper body into the shape of a square can by crimping said strip at intervals to form the corners, and which crimping also facilitates the shipment of the can body material in the flat.

In the accompanying drawings whlch form a part of this specification, Flgure 1 is a perspective view of a strip of c ardboard forming part of the can body. Flg. 2 is a similar view of a similar strip coated with the cement. Fig. 3 is a similar view of the two strips when united together step fashion. Fig. 4 is a View of the composite strip shown at Fig. 3 when the same 1s folded around a mandrel preparatory to uniting the two ends of the strip. 5 is a perspective view of the act of unitmg the two ends of the cemented `strip by the application of a hot iron. Fig. 6 is a fragmentary section of the can body material, showing the joint between the two ends of the strip. Fig. 7 is a horizontal section of can body extended into the square form ready to receive the head. Fig. 8 is a vertical section of the completed can comprising the cement paper body and sheet metal top and bottom heads, and Fig. 9 is a view of the paper body without the heads when pressed into the flat for shipment.

In said drawings 11, 12 are similar strips of cardboard, paper, fiberboard or. other similar material cut into oblong form of suicient width to correspond to the height cemented length to equal the circumference of the can, andenough longer to form the joint'for uniting -the .two ends of the strip Vinto an endless bend. The face of one of the strips,

say-thelstrip 12, lis coated with the cement 13, which should consist of a fusible compound-thatremains hard at ordinary tem; peratures, vbut may be softened and rendered adheslvebythe application of heat, for 'ex-A ample, am'ixture ofv asphaltum, -parain .oil and a fmodlcum .ofl beeswax, enough leave a step 14, 15 at each end, the step 14 being Coated With the cement 4and .the step ofthe. paraffin ,oil .and wax `being employed --to dif ymani/sh -the- -brittleness ofthe asphaltum without `lmnterially lessening its adhesive properties. ',Iihe strip 11 Ais'laid upon the .stmfp 412 in Such manner, see. Fig. 3,'.as to` the cement t-he same as strip 12 and placed Y beneath the strip 12 and extending to form a second step, and the number of strips thus united may be still further increased if desired.VV IVhen the composite strip has been thus laid together, the cement-ing ofthe strips to each other in the flat is accomplished by heating theml, as for example, by lroning them with a hot iron until the cement has been softened and made to adhere to the paper of the superposed strip. The composite strip still in the fiat is now taken and at stated intervals is creased with three creases 16, 17, 18. These creases extend across the strip from side to side and are intended to facilitate the folding of the body into the square form. The three creases have the effect of giving a square form to the body with slightly rounded corners, the rounded corners being intended to facilitate the operation of seaming or compressing the subsequently applied sheet metal head to -the .said paper body. To unite the stepped ends of the strip, said strip is folded around a mandrel 19 of proper size and shape, and. a hot iron 20 applied to the stepped side seam, see Figs. 4 and 5.

i Suitable sheet metal heads 2l, 21 are seamed or crimped upon the body to form a completed vessel, the last head being applied after the vessel has been filled. This can or vessel in the knockdown with the bodies completev and ready for application of the hea s may be readily shipped in a condition so far completed as to require only the application and crimping on of the heads, since the bodies may be pressed fiat into the form indicated at Fig. 9 and the loose heads packed therewith in small space.

The vessels made in this manner, wherein l the layers are cemented by a cement consisting of a fusible compound united by applicationof heat,y as contradistin ished from the ordinary cements employed 1n similar relation, are much more thoroughly water and grease proof than such paper vessels seamed or built up by the employment of such solvent softened astes or cements. Because, in order to harden solvent softened cement, the solvent must be dried out, which it can onl do by passing through the layers of paper between which it is placed, and which escape of the solvent through the paper tends to leave both the paper and the cement in a state where they are pervious to water and grease, especially the latter. And thisimpervious character of the can -body built up of layers of paper united by fusible cement is specially valuable Where the can o1" vessel is to be used for containing aromatic foods, such as coffee, tea, etc., aswill be readily understood. t

Where the term paper is used, any kind or sort of fibrous material is meant.

Having described the invention, claim is made as follows:

1. The vessel having walls made of layers of paper united to each other by a fused cement, substantially as specied.

2. The can body composed of oblong layers of paper cemented to each other step fashion by a fusedcement and having its stepped ends cemented together by the fusible cement and caused to adhere to each other by the ap lication of heat, substantially as specified).

J ERVIS R. HARBECK.

Witnesses:

PEARL ABRAMs, ESTHER ABRAMS. 

